Which do you prefer to use to keep in touch with your friends，QQ_________

Which do you prefer to use to keep in touch with your friends，QQ__________MSN?

#56400

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but

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You can’t get off the bus ___________ the bus stops.

#55501

after

when

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—Be quick, _______ we’ll be late for the class. —Ok, I’m coming.

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 I am a student ________ I am Chinese.

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You have coughed for several days, Bill. Stop smoking,________ you’ll get better soon.

#58062

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I like to go shopping with you, ________ I’m too busy now.

#57369

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and